查詢插入（更新 刪除）

2021-09-21 18:07:43 字數 2231 閱讀 3156

查詢插入（更新）可用於刷資料，新建乙個中間表，匯入資料，再把資料刷到目標表上

一、mysql：

1、查詢插入：把乙個資料表查詢的結果插入另乙個表：

insert into t_user_project1 (user_id, project_id,is_delete, create_time,update_time, is_current_project)select


distinct(task.assigned_charge_id),1,0,now(),now(),0


from  t_crowd_task_nearest task  where 


task.is_delete = 0 and assign_type = 0 and task.project_id=1;


insert into t_user_project1 (user_id, project_id,is_delete, create_time,update_time, is_current_project)select


distinct(task.assigned_agent_id),1,0,now(),now(),0


from  t_crowd_task_nearest task  where 


task.is_delete = 0 and assign_type = 1 and task.project_id=1


and task.assigned_agent_id not in (select user_id from t_user_project1 )


insert into t_menu (


resource_code,


resource_name,


resource_value,


parent_resource_id,


resource_type,


vue_url


) select


'usermanager',


'使用者管理',


'url',


id,3,	'/user/usermanager'


from


t_menu


where


resource_code = 'user'
2、查詢更新：mysql使用乙個表的資料更新另一張表：

update tb1,tb2 set tb1.address=tb2.address where tb1.name=tb2.name
或連線查詢：

update tb1 a


left join tb2 b  on a.name = b.name


left join tb3 c on b.id = c.user_id


set a.address=b.address


where a.is_delete = 0 and b.is_delete = 0;
3、查詢刪除：mysql查詢刪除不支援from後面的查詢語句包含主表名，如選單表

delete  from t_menu where parent_menu_id in (


select id from t_menu  where menu_id ='user'


);
會報錯[err] 1093 - you can't specify target table 't_menu' for update in from clause ，可以加個臨時表：

delete  from t_menu where parent_menu_id in (


select e. id  from (


select id from t_menu where menu_id ='user'


) e);
二、sqlserver

1、查詢插入：

insert into table_a(account) select user_id from table_b;
2、查詢更新： 

update dbo.table_1 


set dbo.table_1 .project_code=dbo.table_2.project_code


from dbo.table_1 , dbo.table_2  where 


dbo.table_1.project_name=dbo.table_2.project_name;

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